The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Litchfield you can figure out when you can plant alternanthera by looking at the USDA zone info.

Planting Calendar for Alternanthera

Frost tolerance for alternanthera:	Not tolerant of frost.
When to plant:	After the last frost.

It's probably not a good idea to plant alternanthera until after all chance of frost has passed because they are not cold tolerant.

The earliest that you can plant alternanthera in Litchfield is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant alternanthera and expect a good harvest is probably August. If you wait any later than that and your alternanthera may not have a chance to grow to maturity. Starting your alternanthera indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is May 15 in Litchfield. You can expect an average low temperature of -25°F in the coldest months of winter.

Since the USDA zone info for Litchfield is not always accurate the actual date of last frost can change quite a bit from year to year. Since half of the time in Litchfield it frosts late in the year after May 15 be ready to protect your alternanthera in the event of one of those late frosts.

USDA Zone Info for Litchfield

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Litchfield

You may be interested in your other planting guides for Litchfield.